What does it mean by "#define X X"?
In Linux header file epoll.h , I found the following code: enum EPOLL_EVENTS { EPOLLIN = 0x001, #define EPOLLIN EPOLLIN ... } What does it mean by #define EPOLLIN EPOLLIN ?
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How do I fix "ld: error: unable to find library -lgcc" when cross-compiling rust to android?
I'm trying to get rust working on android. However, when I try to cross-compile to android I get the following linking error: $ cargo build --target=arm-linux-androideabi Compiling <project> v0.1.0 (<project>) error: linking with `/opt/android-sdk/ndk/23.0.7599858/toolchains/llvm/prebuilt/linux-x86_64/bin/armv7a-linux-androideabi31-clang` failed:
rustaws cli output automatically being sent to vi
I am learning the AWS CLI (v2) - a software command line tool to work with code, resources and other administration purposes in AWS - and have installed it on Ubuntu 18.04. I am running zsh with oh-my-zsh installed. I am trying to get aws command output to be reported back to the terminal as a JSON string (or even as text), but the output is always redirecte
bash
zshIs there any method to run perf under WSL?
When I wanted to run perf under WSL, I met the follow question: WARNING: perf not found for kernel 4.4.0-18362 You may need to install the following packages for this specific kernel: linux-tools-4.4.0-18362-Microsoft linux-cloud-tools-4.4.0-18362-Microsoft You may also want to install one of the following packages to keep up to date: linux-tools-Microsoft l
Docker - Cannot build multi-platform images with docker buildx
I'm trying to build a multi-platform (amd64, arm64 and armv7) image using docker buildx. Since I'm using an amd64 machine running Ubuntu 18.04, I followed the instructions on the Docker website and installed qemu via: sudo apt install qemu-user However, a weird error appears when I execute the previous command. More specifically, there seems to be an issue w
dockerDo I need apt-get update and upgrade in my Python Dockerfile
I have a very minimalist Dockerfile for my production Django application: FROM python:3.8 ENV PYTHONDONTWRITEBYTECODE 1 ENV PYTHONUNBUFFERED 1 RUN apt-get update && apt-get -y upgrade WORKDIR /app COPY requirements.txt ./ RUN pip install --upgrade pip && \ pip install -r requirements.txt COPY . . EXPOSE 8000 CMD [ "gunicorn", "api.wsgi:applic
pythonAddress already in use - FastAPI
I keep getting [Errno 98] Address already in use But the address is not in use. I tried to change the ip and port but It isn't budging. from fastapi import FastAPI app = FastAPI() @app.get("/") async def main(): return {"message": "Helloworld，FastAPI"} if __name__ == '__main__': import uvicorn uvicorn.run(app, host="127.0.0.1", port=8000) uvicorn main:app --
fastapiLong-running daemon does not reflect updated /etc/localtime after timezone change
Goal: Determine how a long‑running Linux service can detect and apply a new system timezone (e.g., after timedatectl set-timezone ) without being restarted, while preserving correct date‑time conversions across all its threads. Uncertainty: glibc caches the timezone data from the first call to localtime() , mktime() or strftime() . Editing /etc/localtime or
What happens when a producer ignores SIGPIPE while using head/tail for pagination?
When a producer writes to a pipe that is consumed by pagination utilities such as head or tail , the consumer exits after delivering the requested number of lines and closes its read end. If the producer does not check for EPIPE or ignores SIGPIPE , it may continue writing until the kernel pipe buffer fills, after which further writes block or return EAGAIN